Odroid N2 cnc machined housing

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Odroid N2 cnc machined housing

Post by Chris Oi » Fri May 29, 2020 7:25 pm

Hi,
I am planning to build a cnc machined housing for my N2 similar to the one I built for my XU4:
viewtopic.php?f=98&t=15956

At the moment I am at the first steps of planning and need some help ;)

Could someone please tell me exactly how high the S922X CPU stands from the Board?
My N2 is in daily use so I want to avoid disassembling it at the moment
I found some 3d files of the board here in the forum but I´m not sure if the dimensions are correct.
There is a gap of 0,19mm between the board and the CPU in those files and the overall height is 1,7mm.
Image
Image

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Re: Odroid N2 cnc machined housing

Post by elatllat » Fri May 29, 2020 8:59 pm

Excerpts from your link to thread;

"changed my job and I don´t have access to the machine anymore"

"it gives me a little bit of headache to publish the .stp for free."

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Re: Odroid N2 cnc machined housing

Post by Chris Oi » Fri May 29, 2020 9:15 pm

Yes, I changed my job and have no personal access to the machine anymore, but a Friend of mine meanwhile has.
And I think I don´t have to publish my own work for free for everyone to copy if I don´t want to since there are hours and hours of work in it and neither did I sell it.
Btw I published my 3D file from the XU4 itself so everyone could design his own housing. At that time there was no 3D model of the XU4 available.
I don´t get your point here :?:

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Re: Odroid N2 cnc machined housing

Post by Tenaja » Fri May 29, 2020 11:30 pm

Your project is interesting.

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Re: Odroid N2 cnc machined housing

Post by rooted » Sat May 30, 2020 3:48 am

Is the 3D file you have from @hominoid ?

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Re: Odroid N2 cnc machined housing

Post by Chris Oi » Sat May 30, 2020 6:23 am

Yes, indeed. He did a very good job on this. Good base to work with.
In the meantime I decided to disassemble my N2 and found out why the original heatsink has a little step of a tenth of a millimeter on the contact surface.
The two RAM modules are 1,1mm and the CPU is 1,0mm in height. At least on my N2 :D .

Image

Also the 3D file of the heatsink has a block on top of the contact surface which I think is the actual CPU. This might give a little confusion if someone is using the file to work with.
Image

Anyhow, I am drawing the pcb from scratch in Autodesk Inventor because it makes it easier for me to build the housing around it.

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Re: Odroid N2 cnc machined housing

Post by Chris Oi » Wed Jun 03, 2020 8:09 pm

In the meantime I finished the 3D file of the N2 PCB which makes it easier for my purpose.
Thank´s to the files from @hominoid from here viewtopic.php?f=182&t=33867 it was a easy job.
I just changed the dimensions that were different on my own N2.
I attached the .stp so maybe it´s useful for someone.

Image

Image

From now on I will start to try different designs for the housing.
I will keep you updated whenever there is something to show.
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Platine Neu.zip
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Re: Odroid N2 cnc machined housing

Post by rooted » Wed Jun 03, 2020 8:27 pm

Yeah I loved your other case, do you still have it?

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Re: Odroid N2 cnc machined housing

Post by Chris Oi » Wed Jun 03, 2020 8:58 pm

Yes, it´s still in use.
At the moment my XU-4 runs on Android and shows the netatmo app of my weather station on a 7 inch screen.
It´s like this for around 4 years now and never had any issue :mrgreen:

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Re: Odroid N2 cnc machined housing

Post by Chris Oi » Fri Jun 05, 2020 12:50 am

Today I started playing around a little bit based on the old design for my XU-4
But I´m not sure if it will work this way because I would like to fit a little oled diplay and maybe a power button too.
And I have to put cutouts in for the front connections while at the same time it should look as clean as possible.
Definetly needs a lot of design work. :lol:
I´m using the N2 with coreELEC so the design should match the living room environment.

Image

Image

Image

Image
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Re: Odroid N2 cnc machined housing

Post by Chris Oi » Tue Jun 09, 2020 7:39 pm

I think the design should go approximately this way.
Since I don´t want any cutouts for the front connections, I have to leave enough room for the usb and audio plug, a Oled display and maybe a power button.
I personally don´t use the IR Reciever but thanks to the feet the signal may still get into the housing.

Image

Image

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Re: Odroid N2 cnc machined housing

Post by Chris Oi » Thu Jun 11, 2020 7:13 pm

thanks to @rooted who pointed me to the project from roidi I bought some Oled displays which work out of the box with roidi's plugin for coreelec.
The 1.3" 128x64 SH1106 Oled seems to work best since the others are way to small.
Does anyone know if there are bigger displays out there also working with roidi's plugin?
The only "issue" I found was that the display shows always HDR10 no matter if it's HDR or HDR10+ but at the moment I can't read the logos from distance.


Image

Image

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Re: Odroid N2 cnc machined housing

Post by rooted » Thu Jun 11, 2020 7:27 pm

Yeah that's the same one I settled on, I want to use the smaller one on the OGA but I'm not sure it can drive it.

I recently ordered a 3D printer primarily to design and print cases for my various devices, I haven't figured out how I want to integrate the screen on the N2 yet but it's too large to fit inside the factory case for sure. I may just increase the height of the front section of the stock case since I really like the design.

I would love a machined case but that's out of my price range and since it already has great passive cooling it isn't an issue.
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Re: Odroid N2 cnc machined housing

Post by Chris Oi » Fri Jun 12, 2020 2:50 am

With a 3d printer you could do something like this but a little bit higher to integrate the display in front and have the N2 flipped to see the cooling fins.
https://www.thingiverse.com/thing:3752116
If you don't use the front connectors you could put the display in the center of the front instead.
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Re: Odroid N2 cnc machined housing

Post by rooted » Fri Jun 12, 2020 5:01 am

Chris Oi wrote:With a 3d printer you could do something like this but a little bit higher to integrate the display in front and have the N2 flipped to see the cooling fins.
https://www.thingiverse.com/thing:3752116
If you don't use the front connectors you could put the display in the center of the front instead.
Thanks for the link and ideas Image

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Re: Odroid N2 cnc machined housing

Post by Chris Oi » Fri Jun 12, 2020 8:43 am

For me the next step is to make a 3D file of the display itself to try to fit it into the design of the housing.
I got this dimensions from the supplyer of the 1.3" display.
Maybe it´s useful for someone

Image
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Re: Odroid N2 cnc machined housing

Post by rooted » Fri Jun 12, 2020 9:07 am

I looked for a larger screen and there may be a compatible screen that is larger but I don't think it would just work.

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Re: Odroid N2 cnc machined housing

Post by Chris Oi » Fri Jun 12, 2020 1:46 pm

What screen do you have in mind?
I would be great to have a bigger screen :mrgreen:

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Re: Odroid N2 cnc machined housing

Post by rooted » Fri Jun 12, 2020 2:34 pm

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Re: Odroid N2 cnc machined housing

Post by joerg » Fri Jun 12, 2020 3:40 pm

@rooted, why you posted especially this one? I see that it's price is Euro 24,81. It causes import taxes here in Germany and somehow bureaucracy. I saw some cheaper models that would not cause import taxes. So that's why I am asking. Is this model special from i2c protocol? I can't find specification.
BTW, why you are posting a Spanish link? :)
@Chris, I am following your thread with interest.

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Re: Odroid N2 cnc machined housing

Post by rooted » Fri Jun 12, 2020 3:43 pm


joerg wrote:@rooted, why you posted especially this one? I see that it's price is Euro 24,81. It causes import taxes here in Germany and somehow bureaucracy. I saw some cheaper models that would not cause import taxes. So that's why I am asking. Is this model special from i2c protocol? I can't find specification.
BTW, why you are posting a Spanish link? :)
@Chris, I am following your thread with interest.
It's just the link that turned up when I searched for displays, I tried to find an English link but my search kept leading to the Spanish version of the site.

I'm not actually sure if that display type would work, I just read somewhere that it may.

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Re: Odroid N2 cnc machined housing

Post by joerg » Fri Jun 12, 2020 3:57 pm

Thank you, I wonder if this oled displays all have the same controller on board. I am about to buy one to have something to play during next vacations that we won't go on journey (lost the trip to Peru :( and maybe a lot of money :evil: ). Sorry for being off-topic.

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Re: Odroid N2 cnc machined housing

Post by rooted » Fri Jun 12, 2020 4:03 pm

Sorry about your cancelled trip.

I think we are mostly on topic since we are all interested in a larger compatible display for the device.

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Re: Odroid N2 cnc machined housing

Post by istanbulls » Fri Jun 12, 2020 4:13 pm

https://www.aliexpress.com/item/3303794 ... 2e0eIXlwxG

I'm flirting with this product too, but it's too expensive, so it may turn into a platonic relationship. :lol:
It has 4 pins and other features are very similar to 1.3. Can those who know from these screens give us an idea?

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Re: Odroid N2 cnc machined housing

Post by rooted » Fri Jun 12, 2020 4:50 pm

istanbulls wrote:https://www.aliexpress.com/item/3303794 ... 2e0eIXlwxG

I'm flirting with this product too, but it's too expensive, so it may turn into a platonic relationship. Image
It has 4 pins and other features are very similar to 1.3. Can those who know from these screens give us an idea?
According to the specs that should be a drop in replacement, says it's 128x64 SSD1309 which is compatible with SSD1306.

But why is it so expensive I wonder?

This is the least expensive I could find ($16.99):

https://www.diymore.cc/products/2-42-in ... lue-yellow

I think this one on Tindie is compatible also ($18.59):

https://www.tindie.com/products/hicenda ... s-ssd1309/

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Re: Odroid N2 cnc machined housing

Post by Chris Oi » Fri Jun 12, 2020 5:14 pm

rooted wrote:
Fri Jun 12, 2020 2:34 pm
This 2.42" OLED:

https://m.es.aliexpress.com/item/32644685038.html
As far as I have read only 4-pin-I2C-displays are working with roidi's plugin for CoreELEC.
Some displays might be convertable with some soldering but I don't know how exactly.
istanbulls wrote:
Fri Jun 12, 2020 4:13 pm
https://www.aliexpress.com/item/3303794 ... 2e0eIXlwxG

I'm flirting with this product too, but it's too expensive, so it may turn into a platonic relationship. :lol:
It has 4 pins and other features are very similar to 1.3. Can those who know from these screens give us an idea?
This one could possibly work. I think it's worth a try

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Re: Odroid N2 cnc machined housing

Post by rooted » Fri Jun 12, 2020 5:20 pm

I wonder if that is true or if those that tried the IIC/SPI forgot to move the resistors? By default IIC is disabled and SPI is enabled.
As for IIC communication, it is necessary to move the resistor on R4 to R3, and R5 is soldered with 0 ohm resistor.

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Re: Odroid N2 cnc machined housing

Post by Chris Oi » Fri Jun 12, 2020 6:03 pm

I just had a short conversation with our company electrician.
He told me that it's quite common to lay out circuit boards in such a way that they can be soldered to another type of controller etc.
So I have two options now :lol:
buying this one and solder it
https://www.diymore.cc/products/2-42-in ... 0396433466

or buying this one and try plug and play
https://de.aliexpress.com/item/33037944 ... 2e0eIXlwxG
I couldn't find any shop in europe who is shipping one of those to germany so I think I'm buying the one from diymore.cc and wait till it gets delivered

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Re: Odroid N2 cnc machined housing

Post by istanbulls » Fri Jun 12, 2020 6:52 pm

rooted wrote:
Fri Jun 12, 2020 4:50 pm

But why is it so expensive I wonder?
I examined this product and the company a little last week.
The company makes special products, it does things that nobody has tried.
I couldn't find any other company making 2.42 " 4 pin oled.
I know as an old manufacturer too. If you make a product that nobody does, you can find buyers at different high prices.
If other chinese manufacturers make 2.42 " 4 pin IIC i2c oled, competition occurs, and the price could become cheaper.

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Re: Odroid N2 cnc machined housing

Post by joerg » Fri Jun 12, 2020 7:43 pm

I will buy one of this in blue for Euro 11,79 + 3,88. In 4 or 5 weeks I can say how it works.
https://de.aliexpress.com/item/33024448944.html
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Re: Odroid N2 cnc machined housing

Post by rooted » Fri Jun 12, 2020 8:00 pm

joerg wrote:I will buy one of this in blue for Euro 11,79 + 3,88. In 4 or 5 weeks I can say how it works.
https://de.aliexpress.com/item/33024448944.html
I bookmarked it, if it works out I will definitely get one as well. The one I have is serviceable but to have one that is 2x as large would be great even if it's 2.5x more expensive Image.
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Re: Odroid N2 cnc machined housing

Post by Chris Oi » Fri Jun 12, 2020 9:21 pm

I also bought one from diymore.cc so let's see who is getting it faster to try it out :lol:
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Re: Odroid N2 cnc machined housing

Post by Chris Oi » Sat Jun 20, 2020 10:52 pm

See what's been in the post today :mrgreen:
Next week it will be soldered since I have to do this at work and then we will know if it works.
The difference in size compared to the 1,3" is huge.

Image

Image

Image

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Re: Odroid N2 cnc machined housing

Post by joerg » Sat Jun 20, 2020 11:37 pm

Oh, that has been fast. ;)
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Re: Odroid N2 cnc machined housing

Post by istanbulls » Sun Jun 21, 2020 1:51 am

I'm looking forward to :D
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Re: Odroid N2 cnc machined housing

Post by rooted » Sun Jun 21, 2020 9:29 am

You should be able to see that at 3 meters without any problems.

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Re: Odroid N2 cnc machined housing

Post by Chris Oi » Tue Jun 23, 2020 11:11 pm

Unfortunately it doesn't work. The display stays dark and the kodi plugin gives a error message.
These are my settings (tryed diefferent ones)
Image
This is what the log says:
2020-06-23 15:43:24.805 T:3741279104 NOTICE: service.odroidn2.oled v0.1.4 -> Service started
2020-06-23 15:43:25.091 T:3741279104 ERROR: EXCEPTION Thrown (PythonToCppException) : -->Python callback/script returned the following error<--
- NOTE: IGNORING THIS CAN LEAD TO MEMORY LEAKS!
Error Type: <type 'exceptions.IOError'>
Error Contents: [Errno 6] No such device or address
Traceback (most recent call last):
File "/storage/.kodi/addons/service.odroidn2.oled/service.py", line 234, in <module>
oled = OledAddon(monitor)
File "/storage/.kodi/addons/service.odroidn2.oled/service.py", line 63, in __init__
self._settings.flipDisplay())
File "/storage/.kodi/addons/service.odroidn2.oled/lib/oled.py", line 54, in __init__
self._initSSD1306_64()
File "/storage/.kodi/addons/service.odroidn2.oled/lib/oled.py", line 105, in _initSSD1306_64
self._command(DISPLAYOFF)
File "/storage/.kodi/addons/service.odroidn2.oled/lib/oled.py", line 67, in _command
self.bus.write_byte_data(self._i2c, 0x00, c)
File "/storage/.kodi/addons/service.odroidn2.oled/lib/smbus2.py", line 391, in write_byte_data
ioctl(self.fd, I2C_SMBUS, msg)
IOError: [Errno 6] No such device or address
-->End of Python script error report<--
I asked @roidi in the coreelec forum if there is any chance we could get this to work so maybe we are in luck an he can help :D
I also asked the seller of the display if their instructions for soldering are right.
I didn't understand their line: "The seventh pin CS signal is leaded by default; If you do not need it, you can solder R18, then CS signal is directly grounded."
I couldn't even find a R18 on the PCB

*EDIT*:
I read in the comments at the sellers page that other people had problems too and they soldered R7 too.
I will try this tomorrow and post an update.

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Re: Odroid N2 cnc machined housing

Post by joerg » Wed Jun 24, 2020 1:03 am

I think they answered something wrong. I see on the back side that R3, R5 must be soldered and I think R4 must not be soldered. As on the one I ordered is written that R4 must be moved to R3 and R5 must be 0 Ohms resistant. On this link there is also some schematic. Seems to be the same as yours.
https://de.aliexpress.com/item/33024448 ... 4c4djZKlJD
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Re: Odroid N2 cnc machined housing

Post by Chris Oi » Wed Jun 24, 2020 1:46 am

The original instructions of mine said exactly the same.
Move R4 to R3 and solder R5 with 0 ohms.
But in the comments below on aliexpress someone is writing:

"To come into the IC2 Mode must the Resistance R4 on R3 soldered and zuischen R5 and R7 a bridge eingelotet. Then even between RES and VCC A's Kohm Resistance and between RES and GND A's uF Capacitor braze. IC2 Address is 0x3C should but can be changed if you DC and/or CS to GND or VCC pulls. Works with the 1306 Libary. "

Which sounds to me like this:
- move R4 to R3 and solder R5 and R7 with 0 ohms
- I2C address is 0x3C which should work with the plugin out of the box but can be changed via soldering
- works with SSD1306 library

Some other comment on the diymore site where I bought mine:
"Everything works, to connect by i2c-r4 solder to r3, r5 and r7-shorten, rst-connect via r = 30k to vdd and via c = 4.7mf to gnd, d/c-gnd or vdd-choose the i2c address from two possible."

Meanwhile I tryed to shorten R7 with holding a nail on it and I got the clock showing on the display in coreelec for some seconds.
I´m full of hope that soldering R7 should be the missing point to get this to work correctly.
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Re: Odroid N2 cnc machined housing

Post by Chris Oi » Wed Jun 24, 2020 11:59 pm

Unfortunately it didn't work.
I am pretty sure that it could work since I had the clock shown on the display for about a second while shortening R7 with holding a nail on it.
But after soldering R7 today I couldn’t redo this.
Maybe I destroyed my display but I don’t know.
This is how it is soldered at the moment:
Image

Image

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Re: Odroid N2 cnc machined housing

Post by joerg » Thu Jun 25, 2020 12:40 am

If you can wait until I get mine, I will look how I can make it work and report here.
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Re: Odroid N2 cnc machined housing

Post by Chris Oi » Thu Jun 25, 2020 12:56 am

Yes of course.
Maybe you have more luck.
Meanwhile I will try to find out what it's about with adding some k-ohms resistor and 4,7mf to ground :D

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Re: Odroid N2 cnc machined housing

Post by Chris Oi » Thu Jun 25, 2020 6:35 pm

So here is a little update for now:

After chatting again with our company electrician and reading some of the comments on aliexpress I think we found something else which we will try over the weekend.
Between RES and VCC is some kind of k-ohms resistor needed to get limited voltage to the RES pin. Direct shortening should also work, the resistor is just for safety reasons.
Between RES and GND might some µF capacitor been needed also for safety reasons. Don't ask me why exactly, I'm too stupid to understand everything about this :mrgreen:
The I2C address is 0x3C preconfigured and can be changed to (Probably, information is just based on aliexpress comments) :
0x7A when CS connected to VCC
0x78 when CS connected to GND

I am still waiting for an answer from the supplyer if there is any official documentation for the display.

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Re: Odroid N2 cnc machined housing

Post by mad_ady » Thu Jun 25, 2020 6:42 pm

Back in my day, changing configuration was done with a jumper or two, not by hand-soldering SMD components...
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Re: Odroid N2 cnc machined housing

Post by Chris Oi » Tue Jun 30, 2020 11:37 pm

It's working :mrgreen:
The right display is the 1,3" just for size comparison.
Now I can even see the icons from my 3 meters viewing distance.
Massive kudos to our company electrician without whom I couldn't have done this.
In case you are wondering why the wiring on the board is so strange, It's because I wanted to have everything on the backside of the display so I can fit it better in the housing.
If it is soldered directly to the pins it would be more difficult to connect the cables and soldering on front would make it impossible to fit in the housing.
If you take a look at the wiring diagram you can see in the top left corner that "C1" is also connected to VCC and GND so we took the needed connections from there.
The + on the pcb marks the connection to VCC.

For anyone trying to do the same here an summary:

- move R4 to R3 and solder R5 and R7 each one with 0 ohms resistor
- solder a k-ohms resistor between RES and VCC ( in my case 10 k-ohms, but other values should work too)
- solder a µF capacitor between RES and GND ( in my case 10 µF , but other values could work too)


This is the display I bought:
https://www.diymore.cc/products/2-42-in ... 0396433466

But I think this one will work too:
https://de.aliexpress.com/item/33024448 ... 4c4djZKlJD

And it would be really interesting if this one would work out of the box :?: :
https://de.aliexpress.com/item/33037944 ... 2e0eIXlwxG


Image

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Image

Image

Image

Image
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Re: Odroid N2 cnc machined housing

Post by Chris Oi » Fri Jul 03, 2020 12:05 am

Unfortunately, the display broke today in operation while watching a movie.
Don't know what happened, maybe our soldering wasn't right.
I am quite confused what caused this because it has worked for some days without a problem.
I just wanted to let you know that (maybe) my summary is not quite right.
Now I have to order another one and try my best :roll:

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Re: Odroid N2 cnc machined housing

Post by Chris Oi » Sat Jul 04, 2020 3:54 pm

This display is really trying to fool me :lol:
Yesterday morning I started troubleshooting what may cause the issue and I got the display working again.
But only for a few minutes and after that it turns black again.
Rebooting doesn't help, but when I wait around 15 minutes the display was working again for a few minutes.
When I got home in the evening my girlfriend forgot to power off my power strip in the living room so the odroid was on for around 5 hours.
And what can I say, the display was still working.
It also worked during a two-hour movie.
I have no idea what's going on here.
@joerg has your display already been delivered?

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Re: Odroid N2 cnc machined housing

Post by istanbulls » Sat Jul 04, 2020 5:22 pm

Your screen isn't dead.
After the message that you reported that Oled was broken, I thought your screen was not dead.
You have a problem but finding a complicated problem is both easy and difficult :)))

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Re: Odroid N2 cnc machined housing

Post by joerg » Sat Jul 04, 2020 6:47 pm

@joerg has your display already been delivered?
No, Chris. This is the disadvantage of ordering at AliExpress :mrgreen:
I have to wait. As of tracking information, they used a airplane that needs about 10 days for China to Germany. :?

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Re: Odroid N2 cnc machined housing

Post by Chris Oi » Sat Jul 04, 2020 8:17 pm

istanbulls wrote:
Sat Jul 04, 2020 5:22 pm
Your screen isn't dead.
After the message that you reported that Oled was broken, I thought your screen was not dead.
You have a problem but finding a complicated problem is both easy and difficult :)))
Maybe I need some other capacitor as described here (use google translate)
https://www.3d-druck-community.de/thread-21929.html
Seems the 10µF capacitor is too high.

joerg wrote:
Sat Jul 04, 2020 6:47 pm
No, Chris. This is the disadvantage of ordering at AliExpress :mrgreen:
I have to wait. As of tracking information, they used a airplane that needs about 10 days for China to Germany. :?
Since @roidy is working on supporting SPI mode I ordered two 2,42" displays from aliexpress to have some alternatives to tinker around.
So let's see when they get delivered.

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